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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* PIM for Quagga
* Copyright (C) 2017 Cumulus Networks, Inc.
* Chirag Shah
*/
#ifndef PIM_NHT_H
#define PIM_NHT_H
#include "prefix.h"
#include <zebra.h>
#include "zclient.h"
#include "vrf.h"
#include "pimd.h"
#include "pim_rp.h"
#include "pim_rpf.h"
/* PIM nexthop cache value structure. */
struct pim_nexthop_cache {
struct pim_rpf rpf;
/* IGP route's metric. */
uint32_t metric;
uint32_t distance;
/* Nexthop number and nexthop linked list. */
uint8_t nexthop_num;
struct nexthop *nexthop;
int64_t last_update;
uint16_t flags;
#define PIM_NEXTHOP_VALID (1 << 0)
#define PIM_NEXTHOP_ANSWER_RECEIVED (1 << 1)
struct list *rp_list;
struct hash *upstream_hash;
/* bsr_count won't currently go above 1 as we only have global_scope,
* but if anyone adds scope support multiple scopes may NHT-track the
* same BSR
*/
uint32_t bsr_count;
};
struct pnc_hash_walk_data {
struct pim_instance *pim;
struct interface *ifp;
};
int pim_parse_nexthop_update(ZAPI_CALLBACK_ARGS);
int pim_find_or_track_nexthop(struct pim_instance *pim, pim_addr addr,
struct pim_upstream *up, struct rp_info *rp,
struct pim_nexthop_cache *out_pnc);
void pim_delete_tracked_nexthop(struct pim_instance *pim, pim_addr addr,
struct pim_upstream *up, struct rp_info *rp);
struct pim_nexthop_cache *pim_nexthop_cache_find(struct pim_instance *pim,
struct pim_rpf *rpf);
uint32_t pim_compute_ecmp_hash(struct prefix *src, struct prefix *grp);
int pim_ecmp_nexthop_lookup(struct pim_instance *pim,
struct pim_nexthop *nexthop, pim_addr src,
struct prefix *grp, int neighbor_needed);
void pim_sendmsg_zebra_rnh(struct pim_instance *pim, struct zclient *zclient,
struct pim_nexthop_cache *pnc, int command);
int pim_ecmp_fib_lookup_if_vif_index(struct pim_instance *pim, pim_addr src,
struct prefix *grp);
void pim_rp_nexthop_del(struct rp_info *rp_info);
/* for RPF check on BSM message receipt */
void pim_nht_bsr_add(struct pim_instance *pim, pim_addr bsr_addr);
void pim_nht_bsr_del(struct pim_instance *pim, pim_addr bsr_addr);
/* RPF(bsr_addr) == src_ip%src_ifp? */
bool pim_nht_bsr_rpf_check(struct pim_instance *pim, pim_addr bsr_addr,
struct interface *src_ifp, pim_addr src_ip);
void pim_upstream_nh_if_update(struct pim_instance *pim, struct interface *ifp);
#endif
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